The FCC also discloses the LG G4 SAR values for use when the phone is placed near the head – that rating is measured at 0.72W/kg, and when the phone is near the body, when the estimated value is 0.72W/kg.

SAR is an abbreviation for Specific Absorption Rate, and it represents the maximum value of a measurement taken multiple times in lab conditions. Specifically, SAR is a measure of the strength of the electric and magnetic fields and power density of transmitters operating at 300KHz to 100GHz frequencies. It is represented in watts per kilogram (W/kg). Learn more about the importance of SAR testing here.